    $(document).ready(function() {
        Judgeidentity();
        $(".item").hover(function() {
            let url = $(this).context.id + '_sel'
            $(this).css("background-image", "url(../static/img/" + url + ".png)");
            $(this).css("background-size", "2.2rem,4rem");

        }, function() {
            let url = $(this).context.id
            $(this).css("background-image", "url(../static/img/" + url + ".png)");
            $(this).css("background-size", "1.4rem,2.24rem");
        });

    })



